->연산자 오버로딩

template <typename T>
class SmartPointer
{
private:
	T *ptr;
public:
	SmartPointer(T *ptr) : ptr(ptr) {}
	~SmartPointer() 
        {
                if(ptr!=nullptr)
                       delete ptr; 
        }
	T& operator*() const
	{
		return *ptr;
	}
	T* operator->() const
	{
		return ptr;
	}
};
 
...
 
SmartPointer<Point> sptr1(new Point(0, 0));
 
(sptr1.operator->())->ShowPosition(); 
//sptr1->->ShowPosition() 구문오류 발생!
sptr1->ShowPosition();